Mobile terminal apparatus and radio communication method

Abstract

To provide a mobile terminal apparatus and radio communication method for enabling feedback control information to be efficiently transmitted with an uplink control channel signal, the radio communication method of the invention has, in a mobile terminal apparatus, the steps of receiving a signal for each of a plurality of component carriers from a radio base station apparatus, generating feedback control information for each component carrier from the signal, performing joint-coding on the feedback control information for each component carrier, mapping the feedback control information coded by the joint-coding to subcarriers, and transmitting an uplink transmission signal mapped to the subcarriers.

1 . A mobile terminal apparatus comprising:
 a reception section configured to receive a signal for each of a plurality of component carriers from a radio base station apparatus;   a feedback control information generating section configured to generate feedback control information for each component carrier from the signal;   a coding section configured to perform joint-coding for the feedback control information for each component carrier; and   a mapping sect ion configured to map the feedback control information coded by the joint-coding to subcarriers.   
     
     
         2 . The mobile terminal apparatus according to  claim 1 , wherein the mapping section maps the feedback control information coded by the joint-coding to one component carrier per transmission time interval. 
     
     
         3 . The mobile terminal apparatus according to  claim 2 , wherein the mapping section maps the feedback control information coded by the joint-coding in a format of inter-subframe frequency hopping among the plurality of component carriers, in addition to a format of intra-subframe frequency hopping within a component carrier. 
     
     
         4 . The mobile terminal apparatus according to  claim 2 , wherein the mapping section maps the feedback control information coded by the joint-coding in a format of intra-subframe frequency hopping in one component carrier. 
     
     
         5 . The mobile terminal apparatus according to  claim 1 , further comprising:
 a section configured to performs code multiplexing for the feedback control information coded by the joint-coding.   
     
     
         6 . The mobile terminal apparatus according to  claim 5 , wherein the mapping section maps the feedback control information code-multiplexed in a format of inter-subframe frequency hopping among the plurality of component carriers, in addition to a format of intra-subframe frequency hopping within a component carrier. 
     
     
         7 . The mobile terminal apparatus according to  claim 5 , wherein the mapping section maps the feedback control information code-multiplexed in a format of intra-subframe frequency hopping in one component carrier. 
     
     
         8 . The mobile terminal apparatus according to  claim 1 , wherein the mapping section maps the feedback control information coded by the joint-coding to the plurality of component carriers per transmission time interval. 
     
     
         9 . The mobile terminal apparatus according to  claim 8 , wherein the mapping section maps the feedback control information coded by the joint-coding in a format of multicarrier transmission in a plurality of component carriers. 
     
     
         10 . The mobile terminal apparatus according to  claim 8 , wherein the mapping section maps the feedback control information coded by the joint-coding in a format of intra-subframe frequency hopping in a plurality of component carriers. 
     
     
         11 . The mobile terminal apparatus according to  claim 1 , wherein the mapping section maps the feedback control information coded by the joint-coding in a format of frequency hopping among a plurality of subframes. 
     
     
         12 . A radio communication method comprising:
 in a mobile terminal apparatus,   receiving a signal for each of a plurality of component carriers from a radio base station apparatus;   generating feedback control information for each component carrier from the signal;   performing joint-coding for the feedback control information for each component carrier;   mapping the feedback control information coded by the joint-coding to subcarriers; and   transmitting an uplink transmission signal mapped to the subcarriers.   
     
     
         13 . The radio communication method according to  claim 12 , further comprising:
 in the mobile terminal apparatus, performing code multiplexing for the feedback control information coded by the joint-coding.   
     
     
         14 . The radio communication method according to  claim 12 , wherein the feedback control information coded by the joint-coding is mapped in a format of frequency hopping among a plurality of subframes.